04 blazer engine knock?

Asked by Jun 14, 2016 at 02:49 AM about the 2004 Chevrolet TrailBlazer

Question type: Maintenance & Repair

I have an 04 Chevy blazer (4.2l) that has an
engine knock. Now the thing is it's been
happening for at least 6 months and the
car only has 68000 miles on it andnothing
has happened so I'm assuming it has to be
something other then my engine rod? Any
ideas or am I just screwed out of an
engine.

1 Answer

78,375

Broken piston, I worked with a guy that bought a Trailblazer drove it for 70k and the engine broke a Piston, so he bought a used engine and had it put in that engine had 55k on it it ran till 67k started making the same noise, had it checked and guess what another broken piston. So you might check it for that, and yes your usually out an engine.

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